Patriot86, let's flip this around and say the threat had been legit, but were otherwise identical...
You are saying you would proactively initiate a shootout with SEVEN armed individuals in a crowded place?
Check the photo with the link. Ten people in costume, of which seven are in tac gear or trench and apparently armed.
Edit: Seems to me a better strategy would be to quietly try to get the family to and through an exit, which could then be used as a chokepoint or funnel, prior to any hostilities commencing.
If they are active shooters (shooting) then yes.
Better to fight to the end than line up and be killed like a sheep.
If its some sort of terrorist/hostage takeover, no shooting off the bat the ole "sit down and shut up" commands then not much fighting to do, just comply and wait for an opening. 1 VS 7 are sucky odds.
Thinking of a theater with people shooting, odds are all the exits will be covered. Its really a no win situation.